[5][6] In 1975, she established an American record in the 200-meter butterfly, swimming it in 2:18.2 at the West German Bremen Swimfest.

[1] That year she also won a gold medal and set a new Pan American Games record in Mexico City in the 800-meter freestyle, winning it in 9:05.47.

[11][8] One year after graduating from the Friends School of Baltimore,[12] Weinberg represented the United States at the 1976 Summer Olympics in Montreal, Quebec.

She won a bronze medal in the women's 800-meter freestyle for placing third (8:42.60), following East German Petra Thumer (8:37.14), and American teammate Shirley Babashoff (8:37.59).

A broken leg and shoulder injuries during her college years diversified her athletic pursuits to include racquetball, tennis, kayaking, and cycling.